Here's what you have access to from the inside and the outside. The Evora uses separate parking brake shoes on the inside hat rim of the rear rotors.
If you disconnect the parking brake cable from the interior lever, you should be able to rock the car slightly forward, which should release any tension on the shoes. And then back down the driveway.
If the issue is a stuck secondary cable/adjuster, then you can only reach that from under the car with the undertray removed.
2011 Evora NA - Phantom Black | Paprika | MT | 2+.5